Mining machine



Jan. l0, 1933. F. A. LINDGREN MINING MACHINE Original Filed Marchv 14 1927 4 Sheets-Sheet Jan.1o,1933.

F. A, LINDGREN MINING MACHINE 4 Sheets-sheet 2.

Jan, 10, 1933. F. A. LINDGREN MINING MACHINE Original Filed March 14 1927 4 Sheets-Sheet @E Mmmm.: |711 Jan. 10, 1933. F, A. UNDGREN 1,893,952

MINING MACHINE Original Filed March 14. 1927 4 Sheets-Sheet 4 Patented Jan. i0, 1933 a a. een

Application filed i'arch le, 1927, Serial No. 175,670. Renewed September 13, 1930.

lbottom on the mine bottom while undercutting the coal.

The principal object of the present invention is to provide a lerf cutting machine suitable for use both in longwall and shortwall operations and to this end, as hereinafter more fully described, my improved machine partakes of the particular characteristics heretofore utilized in part on both types of machines generally referred to as longwall and shortwall machines. A further obj ect of the invention is to provide machine which is simple and compact in construction, itbeing understood that mining machines of this character are generally limited, in height, width. and length on account of mining conditions which must be met. In the present rention l have produced a mechanism of suild cient coinpactness to meet the present standards and limitations as to length, height and width7 both in longwall and shortwall practice.

further object of the invention is to provide means in connection with a self-propelling` truck whereby the motor of the cutting machine :may be. utilized to propel the truck when said machine is mounted thereon at varying speeds controlled by mechanism upon the machine itself. thereby eliminating the necessity of providing speed reducing and controlling devices on the self-propelling truck. y

@ther objects of the invention will appear from time to time in the following description of the machine embodying the several features of my invention:

T he invention consists in the combination, construction and arrangement of the parts, as will hereinafter be described in connection i the accompanying drawings, in which: i gure l is a plan view of the machine and truck with a portion of the cutter bar broken away;

Figure Q is an enlarged sectional view of the machine taken on line 2 2 of Figure l;

Figure 3 is a fragmentary side view showing` the front end of the machine in side elevation;

Figure l is a front end view of the machine with parts broken away to show the detachable means for the front feed rope sheave;

Figure 5 is an enlarged sectional view tal-Ien on line 5 5 of Figure l;

Figure 6 is an enlarged plan View of the feed gearing and truck driving connections with parts broken away to show details of said gearing;

Figure 7 is a diagrammatic view illustrating a tyL ical plan of a mine room and showing the machine arranged for making a sumping cut when used as a longwall machine; f

figure B, comprises the motor, preferably in the form of an electric motor. T he third and rear section, indicated generally at C, comprises the feed operating devices and gear reduction mechanism therefor.

As will be seen in Figures 1 and 2, the motor B occupies a position centrally of the frame and has its bottom adapted to rest upon'the mine floor when th-e machine is removed frein the truck, indicated generally by the Figure D. Details of the truck will hereinafter more -fully appear.

The cutter chain supporting section A ex tends forwardly of the motor section B at the same height taereof and the feed operating section C extends rearwardly also at the same height. This relative disposition of the three sections above namet is substantially the same as heretofore utilized in many machines of the longwall type, wherein the cutter chain is located forwardly of and driven from the Cil front end of the motor while the feed inechan'sm is located rearuv'ardly and driven. from the rear end of the motor.

The motor may be of any suitable type, as for instance electric, having a horizontally disposed armature with a driving pinion 2O at the forward end and another driving pinion 21 at the rearward end of said shaft.

The construction of the cutter chain drivmechanism contained in the front end L may be desc"ibed as follows: The r 10 is supported at its rear end on portion 12 mounted for horizontal movement in an annular bearing 13 ie section A and secured by a detachp member or ring 11i. The arrange- 'it is se h that the entire cutter arm and ring may be rotated with respect to the main frame as to permit 'the cutter arm to project forwardly and longitudinally of the fra ie, as for instance when being used as a shortwall machine, (see Figure 7), or to be positioned at one side or the other of said frame when cutting in longwall operations, (see Figure 8). Locking means are provided for holding the cutter arm in any desii-ed positon. As shrwn in Figure 2 the 1ocling means ma y consist of a removable pin extending through an aperture 16 formed tl e frame and into a recess 1T formed in .ie periphery of the ring support 12 upon which the cutter arm is carried. Similar locking recesses: 1S, 1S are provided at opposite sides of the ring 12 (sec Figure 3), so that the cutter arm may lie locked in a posi- 'Y endin from either side of said frame as shown in Figure 8.

The cutter chain 11 is trained about a cutter chain sprocket 21a on a vertical shaft 22 concentric with the supporting ring 12 of the cutter bar, said shaft having bearing in a hub extension formed integral with said ring. A beveled gear 2? has external bearing on the hub extension 24 and is driven from the motor pinion 2() through a pinion 29 keyed on shaft 30 and a beveled gear d1 also he ed on said shaft.

lhe shaft 22 is operatively connected at will to the beveled gear 23 by means of a vertically slidable clutch member 9 mounted on the upper reduced end portion 26 of the sha' 't and having a plurality of downwardly extending clutch jaws 27, riding in recessed portions 27"' of collar 22a. As shown in Figure 2 `the clutch member 9 is disengaged. Wlhen said member is moved downwardly the clutch aws 27 are dropped into engagement with clutch teeth 23@I carried by beveled gear 23 so as to form the driving connection between said beveled gear and the shaft 22.

n the form shown herein it will be observed that when the machine is dismounted from t ie truck and resting in cutting position on the ground the rear end of the cutter bar is disposed beneath an overhanging portion of the front frame section A but this recess is open to both sides of the frame and to the ground so that the cuttings brought back by the cutter chain are readily discharged in any position of the cutter arm relative to the main frame. This open arrangement of the cutter arm also permits the machine to cuta kerf as close to the mine bottom as desired, as for instance, as indicated in dotted lines in Figure 4, the clearance of the cutter chain 11 is such as to form a kerf substantially at the mine bottom.

The front section A also carries one or more detachable sheaves 35 thereon, which are required for the feed ropes when the machine is used in shortwall or room and pillar operations. In the form shown the sheaves 35 are carried on supports 36, 36, having interlocking projections 38, and adapted to be detachably connected by means of a removable bolt 37 in proper position at either side of the front frame section, (see Figures 3 and l). Under ordinary shortwall operating conditions only one of such guide sheaves is usually required, this sheave being attached on the advancing side of the machine and having the feed rope trained thereabout, although under some conditions it may be advisable to use both sheaves during the sumping cut, as shown in Figure 7. Then utilized as a longwall machine neither of these guide sheaves need be used, and in fact should be removed, especially on the side nearest the mine wall so as to permit the cutter arm to be swung into cutting position as shown in Figure 8. More detailed description of the use of the detachable guide sheaves will appear in connection with the following description of the operation of thc machine.

Referring now to the construction and arrangement of the feed operaitng mechanism it will be seen that I provide a novel construction and arrangement of parts disposed mainly at the rear end of the motor whereby the machine can be successfully used either in longwall or shortwall operations. Generally speaking, longwall operations require but one flexible draft device for moving the machine during the cutting operation along a long wall" as shown in Figure 8. The controlling and feeding of the machine in the room and pillar or shortwall system of mining however is somewhat more complicat d and generally requires two ropes or their equivalent, especially during the maneuvering of the machine to malte its initial or sumping cut as shown in Figure 7, or for withdrawing the cutter bar from the working face after it has completed its cross cut at the opposite end of the short wall or face. In the present invention, I provide a pair of winding drums whereon flexible cables are wound, each of said windresaca?.

ing drums and their flexible devicesbeing arranged to provide all the usual requirements heretoforey referred to, either upon longwall or shortwall feed mechanism.

The driving pinion 21 which in the present instance is mounted on one end of the armature shaft 25 as already described, projects fron the rear end ofthe motor casing B and is meshed ywith a pinion keyed on a sleeve l@ 41 which is loosely mounted on a longitudi- 'L' conditions are met with.

nal shaft 42 disposed generally above the axis of the armature shaft 25 as best shown in Figure 5. rlhe sleeve 41 carries a pinion 43 which constitutes the driving or sun gear of a planetary gear mechanism indicated generally at 44.

rlhe planetary Oear mechanism 44 may be of any suitable type heretofore utilized in mining machine transmissions. 1n the form shown herein said planetary includes an outer casing 45 which carries .an internal gear 46 about its outer periphery, and has a hub 47 loosely mounted on the sleeve 41. A cage 50 is mounted for rotation within the casing 45 and carries thereon one or more pair of planeg tary gears 51 and 52, each pair of said gears being mounted side by side and rotating together on the same axis but having a different number of teeth so as to produce a speed differential in the usual manner.

One of the planetary gears 51 is meshed with the internal gear 46 carried by the casing 45. The other planetary gear 52 is meshed with an internal gear 54 carried by a low speed member 55. A. sliding clutch inember 56 is carried on a member 57 extending from the inner surface of a driving gear 58 and has a plurality of clutch jaws 59 adapted to be moved in one direction to engage clutch jaws 60 of the low speed member 55 and in the opposite direction to engage clutch jaws 61 carried on hub 62 of the cage 50, so as to provide a high speed connection. Under normal operating conditions the casing 45 is restrained from rotation by means of a frictionl band 65 and the driving gear 58 may be driven selectively at high or low speed through the clutch conn etions just described. lWhen the machine is put under excessive load conditions at either speed however, the arrangement is such that the casing 45 may be permitted to slip in the friction band 65 thereby protecting the driving parts from danger of breakage when unusual cutting Furthermore, the friction band 65 may be also utilized to afford va 1iations in speed either through the high or low gear connections in the usual manner. The driving gear 58 is loosely mounted on i the shaft 42 and has a hub 67 supported in will hereinafter be more fully described.

The driving gear 58 is meshed with a gear 71 keyed to stub shaft 72 arranged to have bearing in supports 73 parallel with and to one side of the shaft 42. A worm 75 is cai'- ried on shaft 72 and a suitable/thrust bearing 74 is provided at the rear end of shaft 72 to compensate for the end thrust on said worm. A worm gear 76 is meshed with worm 75 and is keyed on a transverse shaft 77 extending substantially the full width of the machine frame as best shown in Figure 5. A pair of sliding clutches 80, 81, are splined each at an opposite end of the transverse shaft 77 to aiord selective driving connections to flexible draft devices, herein shown in the form of winding drums 82 and 83 respectively.

lt will be observed that the worm and worm gear 75, 76, are thus interposed. between the planetary gear 44 and the driven feed drums 82 and 83 so that excessive loads or shocks imposed on the feed operating gearing through either of the rope drums will be borne largely by the worm and worm gear, thus giving further protection to the planetary gearing from unnecessary damage and wear.

The two winding drums 82 and 83 are mounted at opposite sides of a reduced rear end portion B1 of the electric motor, this portion containing the commutator 40 of the electric motor and therefore requiring less lateral space than the main body portion of tne motor B wherein are contained the poles 41, 41, at opposite sides of the armature 42a.

ln the form shown details of construction of the two drums 82 and 83 are similar so that the same numerals are appliedto the same parts. Each drum comprises aV hub 85 bearing on stub shaft 86 carried in a boss 87 formed integrally with the casting of the 'reduced rear end` portion B1 of the motor. rFhe periphery of each drum is provided with an annular rope receiving groove 89 disposed at its outer end. A gear ring 90 is keyed on the periphery of the drum inside of the rope winding groove 89, and meshing with a pinion 91 mounted on the end of the transverse shaft 77. Said pinion is provided With suitable clutch jaws 92 for engagement with one of the sliding clutch members 8G, 81, as heretofore described.

Mounted on the periphery of the drum adjacent the gear ring 90 is a friction brake band 95 adapted to engage a friction surface 96 on 'said drum to retard rotation thereof. rlhis braking device is utilized particularly for controlling the paying out of one of the draft ropes during the maneuvering of the machine on the mine floor, as will hereinafter more fully appear. The friction bands 95 on each of the drums 82 and 83 may be controlld by any suitable manual controlling dei/*ice of the usual form heretofore employed for the same purpose.

From the above description it will be seen that the two drums 82 and 83 are conveniently placed in a recess formed by the reduced end portion B1 of the motor but with the rope receiving groove 89 projecting beyond each side of the motor B at its widest point so as to permit the rope or cable to be extended along either side of the motor when desired.

A plurality of guide devices are disposed at several points on the rear end of the frame to dispose the feed ropes in varying positions required. As shown herein, these guide devices may include two rollers 112, 112, each disposed on a horizontal axis below one of the drums 82 and 83, two guide sheaves 113, 113, each disposed on a vertical axis rearwardly of the rollers 112, 112, and two sheaves 114, 114` at the rear corners of the frame, and a centrally disposed sheave 115 at the center of the rear end of the frame.

The self-propelling truck indicated generally at D may be of any general type heretofore utilized for transporting the mining machine from place to place over the mine tracks excepting that in the present instance I have shown a simplifie-fl form of drive gearing, which is made possible by my novel construction and arrangement of the co-acting drive gearing on the machine itself with which the self-propelling truck is operatively connected when the machine is mounted thereon, as shown in Figures 1, 2 and 6.

As heretofore constructed, a large portion l of the gear reduction mechanism necessary to be interposed between the truck wheels 100 and the driving motor has been carried on the truck, and usually consisting of relatively high-ratio spur or worm gears. In the present invention, it will be noted that the main driving connection with which the truck is detachably connected comprises the hub portion 67 of driving gear 58 at the rear end of the mining machine frame. lWithin the rear end of the hub portion 67 is formed a socket for receiving a head 101 of the driving pin 102 carried by the truck. This pin is non-rotatably mounted in a beveled gear 103 mounted in the forward end of a housing 104 on standard 105 carried at the rear end of the truck, as clearly shown in Figures 1, 2 and G. A bevel gear 100 is keyed on transverse shaft 107 and is meshed with gear 103. The truck wheels 100, 100 are driven from the opposite ends of the transverse shaft 107 as for instance by the usual drive chains 108, 108 and sprockets 109, 109 commonly used as a driving connection in machines of this character.

Referring again to the driving gear 58 on the machine from which the truck is driven, it will be understood from the foregoing description of details of the machine gearing, that this gear 58 is selectively actuated through the planetary gear 44 and clutch mechanism 56 associated therewith at variable speeds. Thus these same variable speeds are available for driving the truck. Furthermore, braking action for the truck while on down grades or coasting is aorded through manipulation of the brake band 65 0n the planetary 44, when clutches and 81 are disengaged. Braking action may also be provided by disengaging clutch 56 and engaging either clutch 80 or 81, so that the truck wheels may be controlled through one of the winding drum brakes 95.

A machine constructed in accordance with my invention may be utilized in the many well known cutting operations of the longwall or shortwall machines, as follows:

When utilized in longwall work the cutter arm is disposed as usual substantially at right angles to the main axis of the machine while it is dragged along the working face of the mine, as shown in Figure 8.

During the cutting operation the machine is preferably provided with a detachable guard rail 110 or its equivalent as shown in this figure, so as to prevent Contact of the inside rope drum 82 with the working face. Only one draft rope is usually required in longwall operations, and for this purpose either of the rope drums 82 or 83 may be utilized. For instance, as shown in Figure 8, the feed rope 111 is trained from the front of the drum 82, under roller 112 beneath said drum and thence about sheave 113. The rope may be passed from the frame either over the adjacent corner sheave 114 or if desired over a centrally disposed sheave 115, depending upon cutting conditions to be met. The other rope drum, however, is always available to assist the maneuvering of the machine, when unusual cutting conditions are encountered.

Either of the draft ropes may be used to swing the cutter arm angularly from one position to another by hooking the end of the rope over an upstanding guard member 120 and exerting a pull thereon in either direction. The projection 120 is provided with a pair of recesses 121, 121, on opposite sides thereof about which the draft ropes may be secured for this purpose.

lVhen utilized as a shortwall machine the cutter arm is swung and locked in position coincident with the longitudinal axis of the machine frame as shown in Figure 7. The two draft ropes 111 and 123 associated with the Winding drums 82 and 83 may then be utilized in any of the well known arrangements for maneuvering the machine over the mine floor while making the .so-called shortwall cut. The arrangement of the feed gearing and controlling clutches 80 and 81 selectively connecting the gearing to the two feed drums mentioned is such as to permit either of the drums to be driven independently of each other and when either of the drums are disconnected the rope may be paid off under the control of the friction band or brake 95. The machine may thus be suinped by power applied to either rope and a cross cut may be made with one of the ropes, as for instance, rope 111, trained over the adjacent sheave 35 at the front end of the machine while the other rope 123 may be utilized foil retarding` movement of the rear end of the machine, for this purpose being trained over adjacent sheaves 113 and 114i in the` usual manner. Retardation of the tail rope 123 may be controlled either by the brake bands 95 on the drum 83 or if desired the associated clutch 81 may be positively connected with the transverse driving, shaft 77, so that the rope on drum will be paid out at the same rate that the rope on drum 32 is wound in. lt will thus be seen that the n'lachine is capable of being fed in either direction, that is from right to left or left to right, and retardation of the rear end of the frame may be controlled either manually through the friction device or automatically by connecting the drum with the drive gearing'. lt will further be understood that the drums may be selectively driven at variable speeds through the planetary gear stil, and that the direction of rotation of the gearing and drums maybe reversed by reversing the motor in the usual manner.

ldlhen the machine is to be mounted on its truck l) for transportation from place to place over mine tracks in the usual inanner the machine is dragged rearwardly under its own power on to the truck until the coupling pin 102 projecting forwardly from the truclr driving mechanism engages in the socket TO on the machine frame. The machine and truch may then be moved under power of the motor' at a wide variation of speeds controllable entirely through the speed controlling mechanism and brakes carried on the machine frame.

Although l have shown and described one embodiment of my invention, it will be understood that the construction and arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, l do not wish to be construed as limiting myself to the specific form illustrated, excepting as it may be specifically' limited in the appended claims.

l claim as my invention:

1. o. mining machine having a frame includingi` a motor section enclosing an electric motor, said motor having a horizontally disposed armature with its commutator disposed to the rear of said motor section, so that the rea portion of the latter' is of less lateral dimensions than the main body portion thereof, and a feed operatingdevice on a transversely disposed horizontal axis closely adjacent one side of said reduced motor portion and rearwardly of said main body portion and having operative connections with the rear end of said motor.

2. A mining machine having` a frame including a motor section enclosing an electric motor, said motor having a horizontally disposed armature with its commutator disposed to the rear of said motor section, so that the rear port-ion of the latter is of less lateral dimensions than the main body portion thereof, and two winding members on transverse axes closely adjacent opposite sides of said reduced end portion and rearwardly of said main body portion and having operativ-c connections with the rear end of said motor.

3. mining machine havingl a frame including a motor section, said motor section having a rear end portion of less lateral dimensions than the main body port-ion thereof, a feed operating member on a transversely disposed horizontal axis at one side of said reduced motor portion and rearwardly of said main body portion, and operative connections between the rear end of said motor and said feed operatinG member including,` a variable speed planetary device disposed on a longitudinal axis and a worm and worm gear interposed between said planetary and said feed operating member.

4. A mining machine having a frame including' a motor section, said motor section having rear end portion of less lateral dimensions than the main body portion thereof, a pair of feed operating members on transversely disposed horizontal axes at Opposite sides of said reduced motor portion and rearwardly of said main bony portion, and operative connections between the rear vend of said motor and said feed operating members including.;` a variable speed planetary device disposed on a longitudinal axis and a Worm and worm gear interposed between said planetary and both of said feed operating` members.

5. A mining,` machine having a frame including a cutter chain section, a motor section, and a feed operating section in horizontal alignment with each other, said motor section comprisingl a horizontally disposed electric motor with its commutator disposed at the rear and having less lateral dimensions than the main body portion of said motor, and a feed opera-ting device rotatable on a bearing` support ext-ending transversely closely adjacent one side of said commutator portion of the motor section and rearwardly of said main body portion said feed operating device having` operative connections with therear end of said motor.

6. il. mining machine having a frame including a cutter chain section, a motor section, and a feed operating section in horizontal alignment with each other, said motor section comprising a horizontally disposed electric motor with its commutator disposed at the rear and having less lateral dimensions than the main body portion thereof, and two winding members each rotatable on transverse bearing supports extending transi versely closely adjacent opposite sides of said 5 portion of lesslateral dimensions than the main body portion thereof, a feed operating device on a transversely disposed horizontal axis at one side of said reduced motor portion and rearwardly of said main body portion, and operative connections between the rear end of s motor and said fced operating member including a variable speed planetary device disposed on a longitudinal axis and a worm and worm gear interposed between said planetary and said feed operating member, said planetary, worm and worm gear all being disposed between the vertical boundaries of said motor section.

8. A mining machine having a frame including a motor section` said motor section comprising a horizontally disposed electric motor 1ith its commutator at tie rear end having less lateral dimensions than the main body portion thereof, feed operating device on a transversely disposed horizontal axis closely adjacent at one side of said reduced motor portion and rearwardly of said main body portion and having operative connections with the rear ene of saitr motor, said feed device having its operative connections disposed adjacent the inner end thereof and having a winding portion pro jecting beyond the lateral boundaries of said motor section, guide devices mounted on the forward end of said frame, and a flexible feeding member adapted to be wound on said winding portion and extend forwardly about said guide devices.

9. In combination,y a mining machine including a motor cutting mechanism selectivelv driven thereby, feed operating mechanism op said machine and multi-speed gearing connections interposed between said feed mechanism and said motor ificluding a planetary device havingl a frictionally controlled reaction member, a truck adapted to support said machine for transporting it from place to place, propelling means carried by said truck, and n'ieans detachably engaging said truck propelling means with said gearing connections on said machine to afford braking action to said propelli means nnder control of said reaction member controlling means when said mining machine is mounted on said truck and said cutting mechanism is inoperative.

l0. A mining machine including a frame, a horizontally disposed motor and flexible feed operating means disposed rearwardly thereof, a winding device adapted to cooperate with a flexible feeding member for feeding said machine along the mine floor and operative connections between said winding member and the rear end of said motor including a planetary `gear reduction device disposed on a horizont-al axis offset verticallyY from the axis of said motor and driven thereby, a rotatable gea-r concentric with said planetary7 gear, clutch means interposed between said planctary and said driving gear for selectively driving the latter at a plurality of speeds, a worm carried on a stub shaft parallel with the axis of said planetary gear and driven from said driving gear, a worm gear meshing with said worm and carried on a transversely extending shaft, and clutch means carried on said transverse shaft affording operative connections with said winding member.

l1. A mining machine including a frame, a horizontally disposed motor and flexible feed operating means disposed rearwardly thereof, a winding device adapted to coopcrate with a flexible feeding member for feeding said machine along the mine floor and operative connections between said winding member and the rear end of said motor including a planetary gear reduction device disposed on a horizontal axis offset vertically from the axis of said motor and driven thereby, a rotatable gear concentric with said planetary gear, clutch means interposed between said planetary and said driving gear for selectively driving the latter at a plurality of speeds, a worm carried on a stub shaft parallel with the axis of said planetary gear and driven from said driving gear, a worm gear meshing with said worm and carried on a transversely extending shaft, and clutch means carried on said transverse shaft affording operative connections with said winding member, all of said gearing connections bcing disposed within the vertical boundaries of said motor.

l2. A mining machine including a frame, a horizontally disposed motor and flexible feed operating means disposed rearwardly thereof, a pair of similar winding devices adapted to cooperate with flexible feeding members for feeding said machine along the mine floor and operative connections between said winding members and the rear end of said motor including a planetary gear reduction device disposed on a horizontal axis offset vertically from the axis of said motor and driven thereby, a rotatable gear concentric with said planetary gear, clutch means interposed between said planetary and said driving gear for selectively driving the latter at a plurality of speeds, a worm carried on a stub shaft parallel with the axis of said planetary gear and driven from said driving gear, a worm gear meshing with said worin and carried on a transversely extending shaft, and clutch means carried on said trans verse shaft a'ording selective operative connections with sait winding members at similar speeds, all of said gearing connections being disposed within the vertical boundaries of said motor.

13. A mining machine including a frame, a. horizontally disposed motor and flexible feed operating means disposed rearwardly thereof, a winding device adapted to cooperate with a flexible feeding member for feeding said machine along the mino flo-or and operative connections between said winding member and the rear end of said motor including` a planetary gear reduction device disposed on a horizontal axis vertically from the axis of said motor and driven thereby, a rotatable gear concentric with sait planetary gear, clutch means interposed between said planetary and said driving gear for selectively driving the latter at a plurality of speeds, a worm carri-ed on a stub shaft parallel with the axis of said planetary gear and driven from said driving gear, a worm gear meshing with said worm and carried on a transversely eri-tending shaft, clutch means carried on said transverse shaft affording operative connections with said winding member, all of said gearing connections being disposed within the vertical boundaries of said motor, a truck adapted to support said macl ine having propelling means at the rear end hereof, and means detachably engaging said truck propelling means with a part driven by said driving gear whereby the reduction afforded through the planetary may be transmitted to both the winding drum and the truck propelling means.

14. ln combination, a mining machine including a motor, cutting mechanism selectivelydriven thereby, feed operating mechanism on said machine independent of said cutting mechanism, multi-speed gearing connections interposed betr-.reen said feed mech anism and said motor including a planetary device having a frictionally controlled reaction member, a tru/el; adapted to support said machine for transporting it from place to place, propelling means carried by said truck, and means detacliably engaging said trucl propelling means with said gearing connections on said machin-e whereby said truclr may be driven through said gearing connections under control of said reaction member controlling means when said mining machine is mounted on said truck.

l5. ln a mining machine, a motor having its power shaft horizontally disposed and extending longitudinally of the machine and the height of said motor substantially determining tl e height of the machine, cutting mechanism forwardly of said motor and driven therefrom comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of feed drums rotatable about a hori zontal transverse axis, and means for driving said feeding mechanism from said motor comprising a plural speed frictionally controlled gear reduction mechanism disposed on an axis extending longitudinally of said i'nining machine offset from and operatively connectible with the rearward end of said motor shaft.

16. In a mining machine, a motor having its power shaft horizontally disposed and eX- tending longitudinally of the machine and the height of said motor substantially determinino' the height of the machine, cutting mechanism forwardly of said motor and driven therefrom comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor, feeding mechanism disposed rearwardly of said motor on cach side thereof comprising a plurality of feed drums and means for driving said feeding mechanism from said motor comprising a. plural speed frictionally controlled gear reduction mechanism operatively connectible with the rearward end of said motor shaft, and a worm and worm gear interposed between said plural speed frictionally controlled gear reduction mechanism and said feed drums.

17. 1n a mining machine, a motor having its power shaft horizontally disposed and extending longitudinally of the machine and the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor and driven therefrom comprising a cutter bar whose uppermost and lower-most portions lie in planes intersecting said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of feed drums rotatable about a horizontal transverse axis and means for driving said feeding mechanism from said motor com prising a` variable speed planetary gear reduction mechanism disposed on axis extending longitudinally of said mining machine offset from and operatively connectible with the rearward end of said motor shaft.

18. In a mning machine, a motor having its power shaft horizontally disposed and eX# tending longitudinally of the machine and the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor ands driven therefrom comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor, feeding mechanism disposed rearwardly of sait` motor on each side thereof comprising a plurality of feed drums and means for driving said feeding mechanism from said motor comprising a variable speed planelary gear r duc tion mechanism operatively ccnnectible with the rearward end of said motor shaft, and a worm and worm gear interposed between said planetary gear reduction mechanism and said feed drums.

19. In a mining machine, a motor having its power shaft horizontally disposed and cxtending longitudinally of 'the machine, and the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor having a cutter chain movable thereabout driven from the forward end of said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums rotatable about a horizontal transverse axis, and means for independentl driving said winding drums from the rearward end of said moor comprising a variable speed planetary gear reduction mechanism disposed on an axis extending longitudinally of said mining machine offset from and operatively connectible with the rearward end of said motor shaft.

20. In a mining machine, a motor having its power shaft horizontally disposed and eX- tending longitudinally of the machine and the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor having a cutter chain movable thereabout driven from the forward end of said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums, and means for independently driving said winding drums from the rearward end of said motor comprising a variable speed planetary gear reduction mechanism operatively connectible with the rearward end of said motor shaft, and a worm and worm gear interposed between said planetary gear reduction mechanism and said feed drums.

Q1. In a mining machine, a motor having its power shaft horizontally disposed and eX- tending longitudinally of the machine, and the height of said motor substantia ly determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor having a cutter chain movable thereabout driven from the forward end of said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums, and means for independently driving said winding drums from the rearward end of said motor comprising a variable speed planetar gear reduction mechanism operatively connectible with the rearward end of said motor shaft, a shaft extending transversely of said mining machine, means for selectively connecting said shaft vith either of said winding drums, and a. geared reduction mechanism interposed betweeny said planetary gear reduction mechanism and said transverse shaft.

22. In a mining machine, a motor having its power shaft horizontally disposed and extending longitudinally of the machine, and the height of said motor substantially determining Jdie height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor having a cutter chain movable thereabout driven from the forward end of said n'ietor, feeding mechanism disposed rearwardly of said motor on each side thereof compri g a plurality of power driven winding dums, an d means for independently driving said winding drums from the rearward end of said motor comprising a variable speed planetary gear reduction mechanism operatively connectible with the rearward end of said meter shaft, a shaft extending transversely of said mining machine, means for selectively connecting said shaft with either of said winding drums, and a worm and worm gear interposed between said planetary gear reduction mechanism and said transverse shaft.

23. In a mining machine, a motor having its power shaft horizontally disposed and extending longitudinally of the machine, the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor having a cutter chain movable thereabout driven from the forward end of said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums, and means for independently driving said winding drums from the rearward end of said motor comprising a variable speed planetary gear reduction mechanism operatively connectible with the rearward end of said motor shaft, a shaft extending transversely of said mining machine, means for selectively connecting said shaft with either of said winding drums, and a worm and worm gear interposed between said planetary gear reduction mechanism and said transverse shaft said winding drums and all of said gearing connections being disposed within the vertical boundaries of said motor.

Q4. In a mining machine a motor having its power .shaft horizontally disposed and extending longitudinally of the machine, the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes .intersecting said motor having a cutter chain movable thereabout driven from the forward end of said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums adapted to cooperate with flexible feed members for feeding said mining machine along the mine floor in opposite directions, and operative connections between said winding drums and the rear end of said motor including a. variable speed planetary gear reduction device, a worm driven by said planetary gear device, a worm gear meshing with said worm and carried on a transversely extending shaft, and clutch means carried on said-transverse shaft affording selective independent operative connections with said winding drums. y

25. In a mining machine, a motor having its power shaft horizontally disposed and extending longitudinally of the machine and the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost portions 'line in planes intersecting said motor having a cutter chain movable thereabout driven from the forwardl end of said motor, :feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums adapted to cooperate with flexible feed members for feeding said mining machine along the mine floor in opposite directions, and operative connections between said winding drums and the rear end of said motor including a planetary gear reduction device disposed on a horizontal axis offset vertically from the axis of said motor `and driven thereby, a rotatable gear concentric with said planetary gear, clutch means interposed between said planetary and Asaid driving gear for selectively driving the latter at a plurality of speeds, a. worm carried on a stub shaft parallel with the axis of said planetary gear and driven from said driving gear, a worm gear meshing with said worm and carried on a transversely extending shaft, and clutch means caried on said transverse shaft affording operative connections with said winding drums.

26. In a mining machine, a motor having i its power shaft horizontally disposed and extending longitudinally of the machine, the height of said motor substantially determining the height of the machine, cutting mechanism forwardly of said motor comprising a cutter bar whose uppermost and lowermost `portions lie in planes intersecting said motor having a. cutter chain movable thereabout driven from the forward end of said motor, feeding mechanism disposed rearwardly of said motor on each side thereof comprising a plurality of power driven winding drums adapted to cooperate with flexible feed members for feeding said mining machine along the mine floor in opposlte directions, and operative connections between said winding drums and the rear end of said motor including a planetary gear reduction device disposed on a horizontal axis offset vertically from the axis of said motor and driven thereby, a rotatable gear concentric with said planetary gear, clutch means interposed between said planetary and said driving gear for selectively driving the latter at a plurality lof speeds, a worm carried on a stub shaft .parallel with the axis of said planetary gear and driven from said driving gear, a worm gear meshing with said worm and lcarried on a transversely extending shaft, and clutch means carried on said transverse shaft affording operative connections with said winding drums, all of said gearing connections being disposed within the vertical boundaries of said motor. 27. In a mining machine, a motor havmg its power shaft horizontally disposed and extending longitudinally of the machine, the height of said motor substantially determining the height of the machine, cutting mechanism forwardly ofv said motor comprising a cutter bar whose uppermost and lowermost portions lie in planes intersecting said motor having a cutter chain movable thereabout driven from the forward end of said motor, Yfeeding mechanism disposed rearwardly of-said motor on each side thereof comprising a pair of similar winding drums adapted to cooperate with flexible feeding members for feeding said mining machine along the mine iloor in opposite directions, and operative connections between said winding drums and the rear end of said motor including a variable speed planetary gear reduction device disposed on a horizontal axis offset vertically from the axis of said motor and driven thereby, a rotatable gear concentric with said planetary gear, clutch means interposed between said planetary and said driving gear for selectively driving the latter at a plurality of speeds, a worm carried on a stub shaft parallel with the axis of said planetary gear and driven from said planetary gear, a worm gear meshing with said worm and carried on a transversely extending shaft, and clutch means carried on said transverse shaft affording selective operative connections with said winding drums at similar speeds, all of said gearing connections being disposed within the vertical boundaries of said motor.

28. In a mining machine, a machine frame ci y slidable on its bottom on the mine bottom, a horizontal motor carried thereby having its axis extending longitudinally of the machine, eutting'mechanism driven from one end of said motor, and feeding means driven from the opposite end of said motor for feeding the machine bodily laterally over the mine bottom comprising relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and rotatable onhorizontal transversely extending axes in a direction to draw in their respective flexible feeding means by power.

29. In a. mining machine, a machine frame slidable on its bottom on the mine bottom, a horizontal motor carried thereby having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor, and feeding means driven from the'opposite end of said motor for feeding the machine bodily laterally over the mine bottom 'comprising relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and rotatable on horizontal transversely extending axes in a direction to draw in their respective flexible feeding means by power and disposed at the end of the machine remote from said cutting mechanism.

30. In a mining machine, a machine frame slidable on its bottom on the mine bottom, a horizontal motor carried thereby having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor, and feeding means driven from the opposite end of said motor for feeding the machine bodily laterally over the mine bottom comprising coaxially arranged relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and rotatable on horizontal transversely extending axes in a direction to draw in their respective flexible feeding means by power.

31. In a mining machine, a machine frame slidable on its bottom on the mine bottom, a horizontal motor carriedthereby having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor including a pivoted cutter bar swingable into positions at opposite sides of the machine and lengthwise of the machine, and feeding means driven from the opposite end of said motor for feeding the machine bodily laterally over the mine bottom in any position of said bar comprising relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and rotatable on horizontal transversely extending axes in a direction to draw in their respective flexible feeding means by power.

32. In a mining machine, a machine frame slidable on its bottom on the mine bottom,

' a horizontal motor carried thereby having its axis extending longitudinally of the mav chine, cutting mechanism driven from one end of said motor including a pivoted cutter bar swingable into positions at opposite sides of the machine and lengthwise of the machine, and feeding means driven from the opposite end of said motor for feeding the machine bodily laterally over the mine bottom in any position of said bar comprising relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and rotatable on horizontal transversely extending axes in a direction to draw in their respective flexible feeding means by power and disposed at the end of the machine remote from said cutting mechanism.

In a mining machine, a machine frame slidable on its bottom on the mine bottom, a horizontal motor carried thereby having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor including a pivoted cutter bar swingable into positions at opposite sides of the machine and lengthwise of the machine, and feeding means driven from the opposite end of said motor for feeding the machine bodily laterally over the mine bottom in any position of said bar comprising eoaxially arranged relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and rotatable on horizontal transversely extending axes in a direction to draw in their respective flexible feeding means by power.

34. In a mining machine. a machine frame slidable on its bottom directly on the mine bottom, a horizontal motor carried by said frame and having its axis extending longitudinally ofthe machine, cutting mechannism driven from one end of said motor including an elongated plane cutter bar projecting horizontally from said frame at one end thereof, and machine feeding mechanism driven from the opposite end of said motor including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal transversely extending axes at the end of the machine remote from said cutter bar, and mechanism for effecting rotation of said members separately or simultaneously in a direction to drawv in said flexible feeding means at relatively slow speed or at relatively high speed or to permit them to rotate in a direction to pay out said flexible feeding means under frictionally controlled resistance.

35. In a mining machine, a machine fra-me slidable on its bottom directly on the mine bottom, a horizontal motor carried by said frame and having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor including an elongated plane cutter bar projecting horizontally from said machine at one end thereof and machine f feeding mechanism driven from the opposite end of said motor including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal transversely extending axes at the end of the machine remote from said cutter bar, and mechanism for effecting rotation of said members separately or sinmltaneously in a direction to draw in said flexible feeding means at relatively slow speed or at relatively high speed, to permit them to rotate in a direction to pay out said flexible feeding means under frictionally controlled resistance or to permit them to rotate in a direction to pay out said flexible feeding means witnoutsuch resistance.

36. In a mining machine, machine frame slidable on its bottom directly on the mine bottom, a horizontal motor carried by said frame and having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor including an elongated plane cutter bar projecting horizontally from said frame at one end thereof and pivotally mounted on said frame to swing horizontally relative thereto, mechanism driven by said motor for swinging said cutter bar relative to said frame, and machine feeding mechanism driven from the opposite end of said motor including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal transversely extending axes at the end of the machine remote from said cutter bar, mechanism for effecting rotation of said members separately or simultaneously in a direction to draw in said flexible feeding` means at relatively slow speed or at relatively high speed, and means to control the actuation of each of said feed operating members independently of each other.

37. In a mining machine, a machine frame slidable on its bottom directly on the mine bottom, a horizont-al motor carried by said frame and having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor including an elongated plane cutter bar projecting horizontally from said frame at one end thereof and pivotally mounted on said frame to swing horizontally relative thereto, mechanism driven by said motor for swinging said cutter bar relative to said frame, and machine feeding mechanism driven from the opposite end of said motor including relatively rotatable feed operating members each adapted to coopera-te with flexible feeding means and disposed on horizontal transversely extending axes at the end of the machine remote from said cutter bar, and mechanism for effecting rotation vof said members separately or simultaneously in a direction to draw in said flexible feeding means at relatively slow speed or at relatively high speed or to permit them to rotate Ain a direction to pay out said flexible feeding means under frictionally controlled resistance.

38. In a mining machine, a machine frame slidable on its bottom directly on the mine bottom, a horizontal motor carried by said frame and having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor including an elongated `plane cutter bar projecting horizontally from said frame at one end thereof and pivotally mounted on said frame to swing horizontally relative thereto, mechanism driven by said motor. for swinging said cutter bar relative to said frame, andmachine feeding mechanism driven from the opposite end of said motor including relatively yrotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal transversely extending axes at the end of the machine remote from said cutter bar, and mechanism for effecting rotation of said members separately or simultaneously in a direction to draw in said flexible feeding means at relatively slow {speed or at relatively high speed, to permit them to rotate in a direction to pay out said flexible feeding means under frictionally controlled resistance or to permit them to rotate 'f in a direction to pay out .said flexible feeding means without such resistance.

39. In a mining machine, a frame slidable directly on its bottom on the mine bottom, a horizontal motor carried by said frame and having its power shaft extending longitudinally of the machine, the height of said motor being only that requisite for the power producing function and determining the height of the machine, cutting mechanism "l driven from one end of said motor and including a horizontal plane cutter bar projecting from said frame at one end thereof, the top and bottom plane surfaces of said bar lying in planes intersecting said motor,l and machine feeding mechanism driven from the opposite end of said motor and including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal axes extending transversely of the machine at the end thereof remote from .said cutterbar, said members being rotatable simultaneously in a direction to draw in their respect-ive flexible feeding means by power.

40. In afmining machine, a frame slidable directlyvon its bottom on the mine bottom, a horizontal motor carried by said frame and having its power shaft extending longitudinally ofthe machine, the height ofsaid mot-or being only that requisitefor the power producing function and determining Vthe height of the machine, cutting mechanism driven from one end of said motor and incl-uding a horizontal plane cutter barprojecting from said frame at one end thereof, the top and bottom plane surfaces of said cutter bar lying in planes intersecting said motor, and machine feeding mechanism driven lfrom the opposite end of said motor and including relativelyV rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal axes extending transversely of the machine at the end thereof remote from said cutter bar, plural speed mechanism between said motor and said feed operating members for effecting rotation thereof in a direction to wind in said flexible feeding means separately or simultaneously at either a relatively slow speed or at a relatively high speed, and means to control the actuation of each of said feed operating members independently of each other.

41. In a mining machine, a frame slidable directly on its bottom on the mine bottom, a horizontal motor carried by said frame and having its power shaft extending longitu` dinally of the machine, the height of said motor being only that requisite for the power producing function and determining the height of the machine, cutting mechanism driven from one end of said motor and including a horizontal plane cutter bar projecting from said frame at one end thereof, the top and bottom plane surfaces of said cutter bar lying in planes intersecting said motor, and machine feeding mechanism driven from the opposite end of said motor and including relatively rotatable feed operating members each adapted to cooperate with fiexible feeding means and disposed on horizontal axes extending transversely of the machine at the end thereof remote from said cutter bar, and plural speed mechanism between said motor and said feed operating members for effecting rotation thereof in a direction to wind in said fiexible feeding means separately or simultaneously at either a relatively slow speed or at a relatively high speed or to permit said members to rotate in a direction to pay out said flexible feeding means under frictionally controlled resistance.

42. In a mining machine, a frame slidable directly on its bottom on the mine bottom, a horizontal motor carried by said frame and having its power shaft extending longitudinally of the machine, the height of said motor being only that requisite for the power producing function and determining the height of the machine, cutting mechanism driven from one end of said motor and including a horizontal plane cutter bar projecting from said frame at one end thereof, the top and bottom plane surfaces of said cutter bar lying in planes intersecting said motor, and machine feeding mechanism driven from the opposite end of said motor and including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal axes extending transversely of the machine at the end thereof remote from said cutter bar, and plural speed mechanism between said motor and said feed operating members for effecting rotation thereof in a direction to wind in said flexible feeding means separately or simultaneously at either a relatively slow speed or at a relatively high speed, to permit said members to rotate in a direction to pay out said flexible feeding means under frictionally controlled resistance or to permit said members to revolve in a direction to pay out said flexible feeding means without such resistance.

43. In a low vein room and pillar mining machine, a frame slidable on its bottom directly on the mine bottom, a low compact horizontal motor carried by said frame and having its power shaft extending longitudinally of the machine, the height of the motor being only that requisite for the power pro ducing function and determining the height of the machine, cutting mechanism driven by said motor including an elongated plane cutter bar projecting horizontally from said frame at one end thereof, the top and bottom plane surfaces of said cutter bar lying in planes intersecting said motor, and machine feeding mechanism driven by said motor including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal axes extending transversely of the machine at the end thereof remote from said cutter bar, mechanism for effecting rotation of said members in a direction to draw in said flexible feeding means separately or simultaneously at either a rel ativcly slow speed or a rela-tively high speed, and means to control the actuation of each of said feed operating members independently of cach other.

44. In a low vein room and pillar mining machine, a frame slidable on its bottom di rectly on the mine bottom, a low compact horizontal motor carried by said frame and having its power shaft extending longitudinally of the machine, the height of the motor being only that requisite for the power producing function and determining the height of the machine, cutting mechanism driven by said motor including an elongated `tplane ciu-- ter bar projecting horizontally from said frame at one end thereof, the top and bottom plane surfaces of said cutter bar lying in planes intersecting said motor, and machine feeding mechanism driven by said motor including relatively rotatable feed operating members each adapted to cooperate with lies:- ible feeding means and disposed on herizontal axes extending transversely of the machine at the end thereof remote from said cutter bar, and mechanism for effecting rotation of said members in a direction to draw in said flexible feeding means separately or simultaneously at either a relatively slow speed or a relatively high speed or to permit said members to rotate in a direction to pay out said flexible feeding means under frictionally controlled resistance.

45. In a low vein room and pillar mining machine, a frame slidable on its bottom directly on the mine bottom, a low compact horizontal motor carried by said frame and having its power shaft extending longitudinally of the machine, the height of the motor being only that requisite for the power producing function and determining the height of the machine, cutting mechanism machine, cutting mechanism driven from one end of said motor including an elongated plane cutter bar projecting horizontally from said frame at one end thereof, machine feeding mechanism driven from the opposite end of said motor and including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means and disposed at the end of the machine remote from the cutter bar, said members being rotatable either separately or simultaneously in a direction to draw in said flexible feeding means by power, and truck driving mechanism driven from one end of said motor.

Signed at Chicago, in the county of Cook and State of Illinois, this 12th day of March,

driven by said motor including an elongated A. D. 1927.

plane cutter bar projecting horizontally from said frame at one end thereof, the top and bottom plane surfaces of said cutter bar lying in planes intersecting said motor, and machine feeding mechanism driven by said motor including relatively rotatable feed operating members each adapted to cooperate with flexible feeding means and disposed on horizontal axes extending transversely of the machine at the end thereof remote from said cutter bar, and mechanism for effecting rotation of said members in a direction to draw in said flexible feeding means separately or simultaneously at either a relatively slow speed or a relatively high speed, to permit said members to rotate in a. direction to pay out said flexible feeding means under frictionally controlled resistance or to permit said members to rotate in a direction-to pay out said flexible feeding means without such resistance.

e6. in a mining machine, a machine frame adapted to rest upon and slid-e in any direction over the mine bottom, a centrally located horizontal motor having its power shaft extending longitudinally of the machine, cutting mechanism driven from one end of said motor including an elongated plane cutter bar projecting horizontally from said frame at one end thereof, machine feeding mechanism driven from the opposite end of said motor and including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means and disposed at the end of the machine remote from the cutter bar, said members being each separately or both simultaneously rotatable in a direction to draw in said flexible feeding means by power, and truck driving mechanism driven from one end of said motor.

47. In a mining machine, a machine frame adapted to rest upon and slide in any direction over the mine bottom, a centrally located h orizontal motor having its power shaft extending longitudinally of the machine, said motor having its Casing resting directly on the mine bottom and the vertical dimension of the motor determining the height of the FRANK A. LINDGREN.

January 10, 1933.

FRANK. A, MNDGREN ion of the ne 108, for

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read "mecha-"- M. J. Moore,

mssner o Patents. 

